Pipe support structure



FIG. 1 is a left side perspective view of the pipe support structure ofthe claimed design;

FIG. 2 is a back view of the pipe support structure of the claimeddesign;

FIG. 3 is a right side view of the pipe support structure of the claimeddesign;

FIG. 4 is a back view of the pipe support structure of the claimeddesign;

FIG. 5 is a top view of the pipe support structure of the claimeddesign; and,

FIG. 6 is a bottom view of the pipe support structure of the claimeddesign.

CLAIM The ornamental design for the pipe support structure, as shown anddescribed.